Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures
Eighteen sediment samples from a 36 cm long sediment core retrieved from a proglacial lake (namely P 11) situated in the Schirmacher Oasis, East Antarctica, were analysed for the study of quartz grain morphology and microtexture, along with sand percentage, to reconstruct the paleoenvironmental chan...
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| Format: | Article |
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Polish Academy of Sciences
2017-03-01
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| Series: | Polish Polar Research |
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| Online Access: | http://www.degruyter.com/view/j/popore.2017.38.issue-1/popore-2017-0002/popore-2017-0002.xml?format=INT |
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| author | Mazumder Abhijit Govil Pawan Kar Ratan Gayathri Narath Meethal Raghuram |
| author_facet | Mazumder Abhijit Govil Pawan Kar Ratan Gayathri Narath Meethal Raghuram |
| author_sort | Mazumder Abhijit |
| collection | DOAJ |
| description | Eighteen sediment samples from a 36 cm long sediment core retrieved from a proglacial lake (namely P 11) situated in the Schirmacher Oasis, East Antarctica, were analysed for the study of quartz grain morphology and microtexture, along with sand percentage, to reconstruct the paleoenvironmental changes in the lake during the Holocene. The age of the core ranges from 3.3 ka BP to 13.9 ka BP. The quartz grain morphology and microtexture reveal significant evidences of glacial transport along with some eolian and aqueous activities. On the basis of predominance of these signatures and the zonation from CONISS Cluster Analysis on the percentages of characteristic grain morphology and microtextures, the entire core has been subdivided into three major zones. From the paleoenvironmental perspective, it can be concluded that there is an onset of interglacial period at the advent of Holocene (12.3 ka BP), which reigned until 5.3 ka BP and thereafter, again a glacial environment prevailed until 3.3 ka BP with some variations in-between. The results indicate probable alternative colder and less colder phases in the study area, which are also well supported by the respective sand percentages in the sediments. |
| first_indexed | 2024-12-21T17:51:18Z |
| format | Article |
| id | doaj.art-bd35c135b28642a88cc8a5b16d7e78ac |
| institution | Directory Open Access Journal |
| issn | 2081-8262 |
| language | English |
| last_indexed | 2024-12-21T17:51:18Z |
| publishDate | 2017-03-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Polish Polar Research |
| spelling | doaj.art-bd35c135b28642a88cc8a5b16d7e78ac2022-12-21T18:55:20ZengPolish Academy of SciencesPolish Polar Research2081-82622017-03-0138111910.1515/popore-2017-0002popore-2017-0002Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtexturesMazumder Abhijit0Govil Pawan1Kar Ratan2Gayathri Narath Meethal3Raghuram4 Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow – 226 007, India Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow – 226 007, India Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow – 226 007, India Department of Marine Geology and Geophysics, School of Marine Sciences, Cochin University of Science and Technology, Cochin – 16, India Polar Studies Division, Geological Survey of India, Faridabad, Haryana – 121 001, IndiaEighteen sediment samples from a 36 cm long sediment core retrieved from a proglacial lake (namely P 11) situated in the Schirmacher Oasis, East Antarctica, were analysed for the study of quartz grain morphology and microtexture, along with sand percentage, to reconstruct the paleoenvironmental changes in the lake during the Holocene. The age of the core ranges from 3.3 ka BP to 13.9 ka BP. The quartz grain morphology and microtexture reveal significant evidences of glacial transport along with some eolian and aqueous activities. On the basis of predominance of these signatures and the zonation from CONISS Cluster Analysis on the percentages of characteristic grain morphology and microtextures, the entire core has been subdivided into three major zones. From the paleoenvironmental perspective, it can be concluded that there is an onset of interglacial period at the advent of Holocene (12.3 ka BP), which reigned until 5.3 ka BP and thereafter, again a glacial environment prevailed until 3.3 ka BP with some variations in-between. The results indicate probable alternative colder and less colder phases in the study area, which are also well supported by the respective sand percentages in the sediments.http://www.degruyter.com/view/j/popore.2017.38.issue-1/popore-2017-0002/popore-2017-0002.xml?format=INTAntarcticaDronning Maud Land Proglacial lakeHoloceneQuartz grainsmicrotexturesand percentageCONISS Cluster Analysis |
| spellingShingle | Mazumder Abhijit Govil Pawan Kar Ratan Gayathri Narath Meethal Raghuram Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures Polish Polar Research Antarctica Dronning Maud Land Proglacial lake Holocene Quartz grains microtexture sand percentage CONISS Cluster Analysis |
| title | Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures |
| title_full | Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures |
| title_fullStr | Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures |
| title_full_unstemmed | Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures |
| title_short | Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures |
| title_sort | paleoenvironments of a proglacial lake in schirmacher oasis east antarctica insights from quartz grain microtextures |
| topic | Antarctica Dronning Maud Land Proglacial lake Holocene Quartz grains microtexture sand percentage CONISS Cluster Analysis |
| url | http://www.degruyter.com/view/j/popore.2017.38.issue-1/popore-2017-0002/popore-2017-0002.xml?format=INT |
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